<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
    <style>
        div {
            width: 100px;
            height: 100px;
            background: red;
            /*形成一个时差，不是同时完成*/
            /*transition: 1s width, 2s height, 3s background;*/
            /*延时时间*/
            transition: 1s width, 2s 1s height, 3s 1s background;
        }

        div:hover {
            width: 300px;
            height: 300px;
            background: blue;
        }
    </style>
</head>
<body>
<div></div>
</body>
</html>